Image Processing Apparatus, and Control Method

This application claims priority from Japanese Patent Application No. 2024-178835 filed on October 11, 2024. The entire content of the priority application is incorporated herein by reference.

In a known technique, an image processing apparatus as a control target is selected via a management apparatus and is controlled, in a state that the plurality of image processing apparatuses is connected to an information processing apparatus serving as the management apparatus. For example, in a known configuration, a printer marked through operation of a button on an operation panel is displayed as the marked printer on a screen provided by a utility which is an application program of the information processing apparatus.

In a case where the plurality of image processing apparatuses is connected to the information processing apparatus, it is not clear, in some cases, as to which one of the image processing apparatuses listed on the screen of the information processing apparatus is the control target. According to the above-described technique, identification of the control target is expected to be easy since the control target is displayed while being marked. However, in such a case where two different image processing apparatuses connected to the same network are managed, respectively, by two persons, e.g. an administrator A and an administrator B via two information processing apparatuses each of which is operated by one of the administrators A and B, the image processing apparatus operated to be marked by the administrator A as the management target is displayed as the marked image processing apparatus also in the information processing apparatus of the administrator B. Accordingly, the administrator B might instruct to transmit a control command to the image processing apparatus of the management target of the administrator A, in some cases.

An aspect of the present disclosure is an image processing apparatus including a user interface; anda communication interface. The image processing apparatus is operable in at least two modes including:a first mode in which, in a case where the image processing apparatus receives a control command transmitted by a program of an information processing apparatus via the communication interface, the image processing apparatus reads and discards the received control command; anda second mode in which, in a case where the image processing apparatus receives the control command via the communication interface, the image processing apparatus stores, in a memory, command information based on the received control command. Depending on acceptance of a first operation via the user interface by the image processing apparatus operating in the first mode, the image processing apparatus is configured to change from the first mode to the second mode. In a case where the image processing apparatus receives the control command via the communication interface while operating in the second mode, the image processing apparatus is configured to change to a state of waiting for a second operation satisfying an execution condition of a specified process corresponding to the received control command. In a case where the image processing apparatus receives the control command via the communication interface while operating in the first mode, the image processing apparatus is configured not to change to the state of waiting for the second operation. The image processing apparatus is configured to execute the specified process corresponding to the control command, based on the command information stored in the memory, depending on acceptance of the second operation via the user interface in the state of waiting for the second operation.

The image processing apparatus described in the present specification changes to the state of waiting for the second operation in a case where the image processing apparatus receives the control command while operating in the second mode, and execute the specified process corresponding to the control command in a case where the image processing apparatus accepts the second operation by a user. Further, in a case where the user transmits the control command from the program of the information processing apparatus, the user causes the image processing apparatus, as the control target, to change from the first mode to the second mode by performing the first operation with respect to the image processing apparatus. In other words, even in a case where the user does not specify the image processing apparatus as the control target in the information processing apparatus, the specified process corresponding to the control command is executed in the image processing apparatus regarding which the first and second operations have been performed by the user. On the other hand, in another image processing apparatus regarding which the first operation has not been performed, the another image processing apparatus is not operating in the second mode. Accordingly, even in a case where the control command is transmitted to the another image processing apparatus, the another image processing apparatus reads and discards the control command, and does not change to the state of waiting for the second operation. Therefore, the specified process will not be executed by the another image processing apparatus which is not the control target.

An aspect of the present disclosure is an image processing apparatus including: a user interface; and a communication interface. The image processing apparatus is configured to wait for reception of a control command transmitted by a program of an information processing apparatus, depending on acceptance of a first operation via the user interface. Depending on the reception of the control command via the communication interface by the image processing apparatus waiting for the reception of the control command, the image processing apparatus is configured to store, in a memory, command information based on the received control command, and to change to a state of waiting for a second operation satisfying an execution condition of a specified process corresponding to the received control command. Depending on acceptance of the second operation via the user interface by the image processing apparatus in the state of waiting for the second operation, the image processing apparatus is configured to execute the specified process corresponding to the control command based on the command information stored in the memory.

An aspect of the present disclosure is a control method for an information processing apparatus. The control method includes: causing the information processing apparatus to execute an instruction acceptance process of accepting transmission instructions of a control command via a user interface of the information processing apparatus; and causing the information processing apparatus to execute, depending on acceptance of the transmission instructions: a determination process of determining an execution condition of a specified process corresponding to the control command; and a transmission process of transmitting, to a plurality of image processing apparatuses via a communication interface of the information processing apparatus, the control command in association with condition information indicating the execution condition determined in the determination process. Each of the plurality of image processing apparatuses to which the control command is to be transmitted in the transmission process is an image processing apparatus which is: operable in at least two modes including: a first mode in which, in a case where the image processing apparatus receives the control command, the image processing apparatus reads and discards the received control command; and a second mode in which, in a case where the image processing apparatus receives the control command, the image processing apparatus stores, in a memory, command information based on the received control command; configured to change from the first mode to the second mode depending on acceptance of a first operation; configured to change to a state of waiting for a second operation satisfying the execution condition, in a case where the image processing apparatus receives the control command while operating in the second mode; configured not to change to the state of waiting for the second operation, in a case where the image processing apparatus receives the control command while operating in the first mode; and configured to execute the specified process corresponding to the control command based on the command information stored in the memory depending on acceptance of the second operation in the state of waiting for the second operation.

The control method described in the present specification causes the information processing apparatus to execute the process of determining the execution condition of the specified process and of transmitting the control command to the plurality of image processing apparatuses, in accordance with instructions of a user. In a case where the image processing apparatus, of the plurality of image processing apparatuses, is operating in the first mode, the image processing apparatus reads and discards the transmitted control command, whereas in a case where the image processing apparatus is operating in the second mode, the image processing apparatus stores the command information in the memory. Accordingly, even in a case where the user does not specify, in the information processing apparatus, the image processing apparatus as the control target, the specified process is not performed by an image processing apparatus, of the plurality of image processing apparatuses, which is not the control target.

A program to be incorporated into the above-described image processing apparatus, a computer-readable storage medium storing the program, a control method for realizing the function of the program, and a system including the image processing apparatuses and the information processing apparatus are also novel and useful.

The technique described in the present specification contributes to realizing, in a system in which a plurality of image processing apparatuses are connected to a network, the technique capable of appropriately controlling an image processing apparatus as a control target among the plurality of image processing apparatuses, from an information processing apparatus connected to the network.

In the following, a system of an embodiment will be described in detail, with reference to the attached drawings. The present specification describes a system which includes a personal computer (hereinafter referred to as "PC") and a plurality of printers.

100 1 200 1 1 FIG. A systemof the present embodiment has a configuration in which a PCand a plurality of printers are connected via a network, as depicted in. The PCis an example of an "information processing apparatus", and the plurality of printers are each an example of an "image processing apparatus".

100 31 32 33 34 35 31 32 33 34 35 100 100 1 FIG. 1 FIG. The systemof the present embodiment as depicted inincludes: printers,, andwhich are of the same model, namely, a "model XX"; a printerwhich is of a "model YY"; and a printerwhich is of a "model ZZ". Each of the printers,,,, andmay be a printer dedicated to cut sheets, a printer capable of printing on a continuous sheet, or a label printer dedicated to label sheets. Although only the five printers are depicted in, the systemmay further include a number of printers, such as several tens of printers. Further, the image processing apparatus included in the systemis not limited to the printers, and may also be, for example, a scanner, a copying machine, a multi-function peripheral, and a facsimile machine.

100 200 Each of the printers included in the systemhas a user interface (hereinafter referred to as "user I/F"), a communication interface (hereinafter referred to as "communication I/F"), and a memory. The communication I/F of each of the printers includes hardware capable of wireless communication with the networkvia, for example, Ethernet, or Wi-Fi (a registered trademark of Wi-Fi Alliance).

The user I/F of each of the printers includes at least hardware which is capable of accepting a user operation. The user IF of each of the printers may include hardware which displays a screen to notify the user of information. The user I/F of each of the printers includes, for example, at least one of: a hardware key (hereinafter referred to as a "hard key"), such as a start key or a cancel key, a keyboard capable of accepting input of a letter and a number, or a liquid crystal display with a touch panel (hereinafter referred to as a "touch panel").

1 FIG. 31 311 311 312 313 32 321 321 322 323 33 331 331 332 333 34 341 341 342 343 35 351 351 352 353 t t t k h In an example depicted in, the printerhas a user I/Fincluding a touch panel, a communication I/F, and a memory. The printerhas a user I/Fincluding a touch panel, a communication I/F, and a memory. The printerhas a user I/Fincluding a touch panel, a communication I/F, and a memory. The printerhas a user I/Fincluding a keyboard, a communication I/F, and a memory. The printerhas a user I/Fincluding a hard key, a communication I/F, and a memory.

1 100 10 11 12 1 13 14 10 10 1 1 1 FIG. 1 FIG. The PCincluded in the systemhas a controllerincluding a CPUand a memory, as depicted in. The PCalso has a user I/Fand a communication I/Fwhich are electrically connected to the controller. Note that the controllerinis a generic term for hardware and software used to control the PC, and does not necessarily represent a single hardware actually present in the PC.

11 12 12 21 22 22 12 11 22 11 1 11 The CPUexecutes various processes in accordance with a program read from the memory, or based on user operation. The memorystores various programs including an operating system (hereinafter referred to as "OS")and an application program, and various data. The application programis an example of a "program". The memoryis also used as a work area in a case where the various processes are executed. Note that the CPUmay read the application programfrom a storage mediumwhich is readable by the CPU. The PCis capable of using, for example, a CD-ROM, a DVD-ROM, and a USB memory, as a storage medium which is readable by the CPU.

200 1 14 The user I/F 13 includes hardware which displays a screen for notifying the user of information, and hardware which accepts the user operation. The communication I/F 14 includes hardware for wireless communication with each of the printers via the network. The PCmay include a plurality of communication I/Fseach corresponding to one of a plurality of communication standards.

22 1 31 32 22 2 2 FIGS.A andB 2 2 FIGS.A andB Next, application procedure for controlling the plurality of printers using the application programwill be described, with reference to a sequence chart of.illustrate application procedure for a user who manages the PCto apply the same setting to the printersand, which are of the same model, by using the application program.

1 200 1 200 Each of the plurality of printers is powered up and started, and changes to an initial mode, before the application procedure is started (Q). The initial mode is an example of a "first mode". The printer of the initial mode is capable of accepting the user operation and is capable of performing an operation based on the user operation. Further, before the application procedure is started, each of the printers is connected to the network. In other words, before the application procedure is started, each of the printers has changed to be capable of accepting the user operation and executing the operation based on the user operation, as well as communicating, for example, with the PCvia the network.

22 1 11 22 1 12 22 14 1 13 22 100 22 31 35 1 FIG. The user who performs the application procedure starts the application programon the PCand inputs a starting instruction for starting controlling of the printers (Q). The application programsearches for a device connected to the PCin accordance with the starting instruction (Q). Specifically, the application programbroadcasts a search signal via the communication I/Fof the PC, and attempts to obtain, from a device which has transmitted a response signal, information on the device (Q). With this, the application programcan extract one or more devices selectable as control target(s). In the systemdepicted in, the application programselects five printersto, as controllable printers.

22 13 1 51 15 22 51 3 FIG. The application programcauses the user I/Fof the PCto display a list display screenshowing a list of the extracted printers, for example, as depicted in(Q). For example, regarding each of the printers which can be controlled by the application program, model name and IP address are displayed in association with each other in the list display screen. The IP address is identification information which identifies each of the printers. Note that the identification information is not limited to the IP address, and may also be a MAC address, serial number, etc.

31 32 311 321 21 The user performs an input operation indicating instructions to start an accepting mode with respect to each of the printerand the printeras the control target to which the setting is applied using the application procedure, via the user I/Fand the user interface, respectively (Q). Each of the printers is capable of operating in at least two modes, which are the initial mode and the accepting mode. The input operation indicating the instructions to start the accepting mode is an example of a "first operation".

Each of the printers may be capable of accepting the instructions to start the accepting mode by, for example, a long or continuous press of a predetermined key, a simultaneous press of a plurality of keys, or operation of a plurality of keys in a predetermined order. Further, in a case where each of the printers has a dedicated key for accepting the input of the instructions to start the accepting mode, the user may operate the dedicated key. Furthermore, a printer which has a touch panel may also be capable of accepting the input of the instructions to start the accepting mode via operation of a predetermined button displayed on the touch panel.

31 32 21 22 31 32 31 32 311 321 33 34 35 33 34 35 21 Each of the printerand the printerchanges to the accepting mode in accordance with the input operation in the process of Q(Q). The accepting mode is an example of a "second mode". Each of the printers is capable of receiving a control command transmitted from an external apparatus. In a case where a printer receives the control command while in the accepting mode, the printer stores command information based on the received control command in the memory, and changes to a standby state. The details of the accepting mode and the standby state will be described later. The printersandmay notify that the printersandhave changed to the accepting mode via, respectively, the user I/Fsand. Note that the printer, the printerand the printerremain in the initial mode since these printers,andhave not accepted the input operation of Q.

22 31 22 51 31 22 32 31 22 31 32 33 The user specifies the model as the control target in the application program(Q). The application programis capable of accepting the selection of the printer(s) as the control target(s) via, for example, indicating of the model name in the list display screenwhich is displayed. In accordance with the instruction in the process of Q, the application programselects all printers which are of the specified model as the control target (Q). In a case where the user has selected the "model XX" in the process of Q, the application programselects the printer, the printer, and the printeras the control targets.

22 22 31 22 32 22 15 22 Note that the function to select the printers through the model specification may be omitted in the application program. In a case where application programdoes not have the function to select the printers through the model specification, the user does not perform the process of Q, and the application programdoes not perform the process of Q. In this case, the application programmay make all the printers displayed in the process of Qthe target of setting, or the application programmay accept regarding each of the printers, the selection of whether to make the printer the target of setting.

22 33 The user specifies information on a specified process to be transmitted to each of the printers which have been selected as the control target, and enters transmission instructions in the application program(Q). The information on the specified process is information including one or more commands to be executed by each of the printers. The information on the specified process is, for example, information including a setting command that includes information on an item or a parameter regarding which each of the printers is caused to change main device setting, or a firmware updating command for causing the each of the printers to update the firmware.

33 22 35 1 Upon receiving the instruction of Q, the application programgenerates an input code (Q35). The input code is information having the following meaning. That is, in a case where a printer accepts an input operation of the input code, the printer satisfies an execution condition of a process based on a setting information. The input code is an example of "condition information", and is an example of a "passcode". The process of Qis a process of causing the PCto determine the input code, and is an example of a "determination process".

The input code is information indicating an operation which is acceptable by the model as the control target. The input code may be information indicating a string of letters or numbers which can be entered via a keyboard or numeric keypad, and may also be information indicating a predetermined operation with respect to the hard key included in the printer, such as an operation of simply pressing a predetermined key, a long or continuous press of a predetermined key, a simultaneous press of a plurality of keys, or operation of a plurality of keys in a predetermined order. Specifically, the predetermined operation may be exemplified by: an operation of pressing the start key, an operation of pressing the start key while pressing the cancel key, etc. Note that the input operation of the input code may be an operation different from the above-described input operation indicating the instructions to start the accepting mode.

22 33 32 1 36 36 22 31 32 33 34 35 1 FIG. 3 FIG. The application programgenerates a control command being a combination of the information on the generated input code and the information on the specified process instructed in the process of Q, and transmits the generated control command to all the printers selected in the process of Qvia the communication I/F 14 of the PC(Q). The process of Qis an example of a "transmission process". In a configuration of, in a case where the "model XX" is selected as depicted in, the application programtransmits the control command to the printer, the printer, and the printer, but does not transmit the control command to the printerand the printerwhich are of the different models.

33 22 1 32 33 33 21 22 11 31 31 33 In other words, depending on acceptance of the transmission instructions in the process of Q, the application programcauses the PCto execute the process of generating the control command to be transmitted to each of the printers, and transmitting the generated control command to all the printers selected in the process of Q. The instructions in the process of Qis an example of a "transmission instructions of a control command", and the process of Qis an example of an "instruction acceptance process". Note that the user may perform the input operation indicating the instructions to start the accepting mode indicated in the process of Qbefore the starting instructions of the application programin the process of Q, or at a timing which is, for example, before the model specification in the process of Q, after the process of Qand before the transmission instructions in the process of Q, etc.

22 13 1 35 36 37 37 22 13 22 13 22 13 22 37 36 4 FIG. Further, the application programcauses the user I/Fof the PCto display the information indicating the input code generated in the process of Qand transmitted in the process of Q(Q). The process of Qis an example of a "displaying process". In a case where the input code is text information, the application programcauses the user I/Fto display information indicating the text, as depicted, for example, in. On the other hand, in a case where the input code is information indicating a predetermined operation, the application programcauses the user I/Fto display information indicating the predetermined operation. Since the application programcauses the user I/Fto display the information indicating the input code, occurrence of such a situation is reduced that the user forgets the input code and is unable to execute the process corresponding to the control command. Note that the application programmay perform the display in the process of Qprior to the transmission in the process of Q.

200 31 32 313 323 313 323 41 42 31 31 22 1 32 32 22 1 43 c c 1 FIG. Each of the printers is capable of receiving, via the network, the control command and is also capable of receiving the information on the input code included in the control command. A printer which has received the control command performs a process with respect to the received command, in accordance with the mode of itself. Specifically, the printersand, which are in the accepting mode, store command informationand command informationbased on the received control command in the memoryand the memory, respectively, for example as depicted in(Q), and change to a standby state which is a state of waiting for the input code (Q). Further, the printertransmits a response signal, indicating that the printerhas stored the command information and has changed to the standby state, to the application programof the PC, and the printertransmits a response signal, indicating that the printerhas stored the command information and has changed to the standby state, to the application programof the PC(Q).

31 311 311 311 t t t 5 FIG. The standby state is a state that a printer waits for the input operation of the input code. The input operation of the input code is an example of a "second operation". In a case where the printer is in the accepting mode and has changed to the standby state, the printer enters such a state that the printer waits for the input operation of the input code, and that even in a case where the printer accepts another operation other than the input operation of the input code, the printer does not perform an operation corresponding to the another operation. For example, the printerincluding the touch panelcauses the touch panelto display an input field for accepting the input code, but does not cause the touch panelto display, for example, any other icon, as depicted in. For example, in a case where a printer not including a liquid crystal panel accepts another operation other than the input operation of the input code, this printer emits, for example, a beep sound and ignores the another operation. In a case where a printer has changed to the standby state, the printer restricts the acceptance of another operation other than the input operation of the input code, thereby avoiding the occurrence of such a situation that the start of execution of the process corresponding to the control command is held due to the execution of a process corresponding to the another operation.

Note that, regarding each of the printers, a printer stores, in its memory in advance, a waiting period during which the standby state can be continued; in a case where a time elapsed since the beginning of the standby state exceeds the waiting period, the printer cancels the standby state by deleting the command information stored in its memory, and then the printer cancels the accepting mode and returns to the initial mode. The waiting period is an example of a "second period".The waiting period may be the same for the printers of various kinds, or may be different for each model. Each of the printers may accept a setting of the waiting period through a user operation. Further, the information on the waiting period may be included in the control command, rather than being stored in the printers, and each of the printers may obtain the information on the waiting period from the received control command.

22 43 22 13 1 45 45 22 31 32 22 13 52 31 32 4 FIG. In a case where the application programaccepts the response signal transmitted by a printer in the process of Q, the application programnotifies, that the printer which has transmitted the response signal has changed to an input-waiting state, via the user I/Fof the PC(Q). The process of Qis an example of an "operation-waiting notification process". For example, in a case where the application programreceives the response signal from each of the printersand, the application programcauses the user I/Fto display a status notification screenwhich indicates that each of the printersandis in the input-waiting state, in association with their own IP addresses, as depicted in.

22 13 22 22 36 22 43 22 13 22 4 FIG. Further, the application programmay cause the user I/Fto display time information indicating a validity period of the transmitted input code, for example, as depicted in. The application programmay start measuring of a remaining time in a case where the application programhas completed the transmission of the control command in the process of Q, or in a case where the application programreceives the response signal transmitted by the printer in the process of Q. In a case where the remaining time of the standby state of each of the printers can be obtained for each of the printers, the application programmay cause the user I/Fto display information on the remaining time for each of the printers. Furthermore, the time information to be displayed is not limited to the information indicating the remaining time, but may be, for example, information indicating the time elapsed since the transmission of the control command. Moreover, the application programmay have the information on the waiting period for each of the printers in advance, or the information on the waiting period for one of the each of the printers may be transmitted from corresponding one of the each of the printers together with the response signal.

22 52 In other words, the application programissues a notification of the presence of a printer which has changed to the standby state, and also displays the remaining time during which the input operation of the input code can be accepted, on the status notification screen. This expectedly encourages the user to perform the input operation of the input code.

45 37 51 31 32 In accordance with the notification in the process of Q, the user inputs the input code displayed in the process of Qto each of the printers which is in the standby state (Q). Specifically, the user inputs the input code to the printersand, which are the printers as the control target, using their own user I/F.

31 32 52 31 32 31 32 Corresponding the input of the input code, each of the printers Aand Breads out the command information stored in its memory and executes a process specified in the control command included in the command information (Q). In a case where the control command includes the setting command including the information on the item or the parameter regarding which the main device setting of the printer is to be changed, each of the printersandapplies the setting indicated in the setting command to the self. In a case where the control command includes the firmware updating command for causing a printer to update the firmware, each of the printers Aand Bupdates the firmware and restarts. The process in which the printer applies the setting indicated in the setting command to the self or the process in which the printer updates the firmware and restarts is an example of a "specified process".

52 Note that in a case where the input code which has been input does not match the input code information included in the command information, a printer may accept the input of the input code again, or may delete the command information without performing the process of Q, and then may return to the initial mode. Further, in a case where a printer accepts, a predetermined number of times, the input of the input code which does not match the input code information included in the command information, the printer may delete the command information.

1 53 54 55 1 In a case where a printer has completed all the processes corresponding to the control command, the printer transmits, to the PC, a completion signal indicating the completion of the process (Q). Further, the printer deletes the command information stored in its memory (Q), cancels the accepting mode, and returns to the initial mode (Q). Each of the printers automatically returns to the initial mode after executing all the processes corresponding to the control command, thereby saving the user the trouble of changing the mode. Note that the accepting mode may be canceled by the user operation or may be canceled in a case where the cancel command is received from the PC. Note that each of the printers automatically changes to the initial mode after restarting, and deletes the command information.

1 14 22 56 56 22 1 In a case where the PCreceives the completion signal from a printer via the communication I/F, the application programassociates the completion signal with the IP address of the printer which has transmitted the completion signal, and issues a notification indicating the completion of the process (Q). The process of Qis an example of a "completion notification process". This enables the user utilizing the application programon the PCto recognize the presence of the printer which has completed executing of the process.

33 31 32 36 33 47 33 33 33 22 33 22 33 4 FIG. On the other hand, the printer, which is of the same model as the printersandbut which is still in the initial mode and has not changed to the accepting mode, receives the control command transmitted in the process of Q. However, the printerreads and discards the control command, without storing the information included in the received control command in the memory (Q). More specifically, the printertemporarily stores the command information included in the control commands in its memory in order to determine the type of the command which has been received. After determining that the received command is the control command, the printerreleases an area, of its memory, in which the command information has been stored, and causes the area to be in a state that command information, another data, etc., to be received next, can be stored in the area. In the present disclosure, the phrase "read(s) and discard(s) a (the) command" means temporarily storing the command information in the memory in order to determine the type of command, and then deleting the command information from the memory. In this case, the printerdoes not change to the standby state and also does not transmit the response signal. Since the application programdoes not receive the response signal from the printer, the application programdoes not display the information indicating the status of the printer, for example, as depicted in.

33 33 33 33 33 33 33 The printer, which has not accepted the operation by the user to cause the printerto change to the accepting mode, does not store the command information in its memory even in a case where the printerreceives the control command, and thus the memory load is small in the printer. For example, even in such a case where the input operation of the input code is similar to the input operation indicating the instructions to start the accepting mode, and that a third party unintentionally performs the input operation of the input code to the printerwhich is still in the initial mode, the printerdoes not execute the process corresponding to the control command since the printerdoes not store the command information. Therefore, the control command is prevented from being applied to the printer which is not the control target.

7 7 FIGS.A andB 2 2 FIGS.A andB 200 Next, a procedure of an application process executed in each of the printers will be described, with reference to the flowchart ofand the sequence chart of. The application process is executed by the CPU of the printer in a case where a printer is started and connected to the network.

200 101 1 111 2 FIG.A 7 7 FIGS.A andB A printer connected to the networkfirst changes to the initial mode (step S; Qin). Then, the printer determines whether the instructions to start the accepting mode has been input via the user I/F (step S). Although omitted in the flowchart of, the printer is capable of transmitting the response signal in a case where the printer receives the search signal transmitted from the PC. Further, the printer in the initial mode is capable of executing various kinds of image processing in accordance with the user operation.

111 21 112 22 113 113 121 31 32 22 2 FIG.A 2 FIG.A 2 2 FIGS.A andB In a case where the printer determines that the printer has accepted the input of the instructions to start the accepting mode (step S: YES; Qin), the printer changes to the accepting mode (step S; Qin) and starts measuring the time elapsed since the printer has changed to the accepting mode. Further, the printer determines whether the time elapsed since the printer has changed to the accepting mode exceeds a predetermined accepting period (step S). In a case where the printer determines that the elapsed time has not exceeded the predetermined accepting period (step S: NO), the printer determines whether the printer has received the control command (step S). Each of the printersand, which has accepted the input of the instructions to start the accepting mode in the process of Qin the procedure depicted in, changes to the accepting mode and waits for receiving of the control command.

121 36 122 122 125 41 126 42 127 43 31 32 2 FIG.B 2 FIG.B 2 FIG.B 2 FIG.B 2 2 FIGS.A andB In a case where the printer determines that the printer has received the control command(step S: YES; Qin), the printer determines whether the printer is in the accepting mode (step S). In a case where the printer determines that the printer has received the control command while operating in the accepting mode (step S: YES), the printer stores the command information in its memory, based on the received control command (step S; Qin), and changes to the standby state (step S; Qin). Further, the printer transmits the response signal to the PC which has transmitted the control command (step S; Qin). The printerand the printer, each of which has received the control command in the procedure depicted in, stores the command information and changes to the standby state.

131 131 132 132 The printer which has changed to the standby state starts measuring of the time elapsed since the printer has changed to the standby state, and determines whether the printer has accepted the input operation of the input code (step S). In a case where the printer determines that the printer has not accepted the input operation of the input code (step S: NO), the printer determines whether the time elapsed since the printer has changed to the standby state has exceeded a predetermined waiting period (step S). In a case where the printer determines that the elapsed time has not exceeded the predetermined waiting period (step S: NO), the printer waits for receiving the input operation of the input code.

131 51 125 135 52 136 53 31 32 31 32 2 FIG.B 2 FIG.B 2 FIG.B 2 2 FIGS.A andB In a case where the printer determines that the printer has accepted the input operation of the input code (step S: YES; Qin), the printer reads out the command information stored in the step Sand executes the process of the control command (step S; Qin). After completing the process of the control command, the printer transmits the completion signal to the PC which has transmitted the control command (step S; Qin). In a case where the printeroraccepts the input operation of the input code in the procedure indicated in, then the printeror the printerexecutes the process of the control command.

131 In a case where the accepted input operation does not match the input code in the stored command information, the printer determines NO in the step S. In other words, the printer executes the process of the control command on the condition that the input of the input code corresponding to the control command is accepted. Therefore, even in a case where a certain printer receives the control command transmitted by the user of another printer and the certain printer changes to the standby state, the certain printer is less likely to unnecessarily execute the process of the received control command.

136 132 137 54 101 55 31 32 32 2 FIG.B 2 FIG.B After the step S, or in a case where the printer determines that the time elapsed since the printer has changed to the standby state has exceeded the predetermined waiting period (step S: YES), the printer deletes the command information stored in its memory (step S; Qin). Then, the printer proceeds to the step Sand changes to the initial mode (Qin). For example, in a case where the user performs the input operation of the input code with respect to the printer, but forgets to perform the input operation of the input code with respect to the printer, the printerdeletes the command information and changes to the initial mode.

Since the waiting period is set for the standby state, the standby state is less likely to be prolonged unnecessarily. Further, in a case where the waiting period has elapsed, the printer automatically returns to the initial mode, and thus the printer is capable of accepting the operation other than the input operation of the input code. This saves the user the trouble of returning the printer from the accepting mode to the initial mode.

111 121 121 34 35 34 35 2 2 FIGS.A andB In a case where the printer does not accept the input of the instructions to start the accepting mode (step S: NO), the printer determines whether the printer has received the control command (step S). In a case where the printer has not received the control command (step S: NO), the printer waits for receiving of the input of the instructions to start the accepting mode and waits for receiving of the control command. For example, in the procedure depicted in, after the printerand the printerhas responded to the device search, the printersandwait for receiving of the input of the instructions to start the accepting mode and waits for receiving of the control command.

121 122 141 47 33 1 33 141 33 101 2 FIG.B 2 2 FIGS.A andB In a case where the printer receives the control command in a state that the printer has not accepted the input of the instruction to start the accepting mode (step S: YES), the printer determines that the printer is not in the accepting mode (step S: NO), and reads and discards the received control command (S; Qin). In the procedure indicated in, the printer, which has not accepted the input of the instruction to start the accepting mode, receives the control command transmitted from the PC, but reads and discards the received control command since the printeris still in the initial mode. After the step S, the printerproceeds to the step S.

113 101 Further, in a case where the printer determines that the time elapsed since the printer has changed to the accepting mode has exceeded the predetermined accepting period (step S: YES), the printer proceeds to the step S, cancels the accepting mode, and changes to the initial mode. The predetermined accepting period is an example of a "first period". For example, a printer which is not the control target might change to the accepting mode due to an erroneous operation of the user or by becoming the control target by another user. Even if the printer has changed to the accepting mode, in a case where the elapsed time has exceeded the predetermined accepting period without receiving of the control command by the printer, the printer cancels the accepting mode and returns to the initial mode. Accordingly, the printer does not keep on waiting for receiving of the control command.

200 22 2 200 1 22 2 1 1 FIG. Next, a case where a plurality of PCs is connected within the communication range of the network, and where the application programis executed in each of the plurality of PCs will be described. Specifically, for example, a PCis connected to the same networkas the PCas depicted inin broken lines, and the application programis also incorporated in the PCin the same manner as the PC.

1 31 32 1 31 32 2 33 31 32 2 33 31 32 33 8 FIG.B For example, in a case where the user of the PCis executing the above-described application procedure with the printerand the printeras the control target, the user of the PCcauses the printerand the printerto change to the accepting mode. On the other hand, in a case where the user of the PCintends to cause the printeras the control target to execute a process corresponding to a control command which is different from the control command for the printersand, the user of the PCfirst causes the printerto change to the accepting mode. As a result, the three printers which are the printer, the printer, and the printerall change to the accepting mode, as depicted in.

1 1 22 31 32 33 1 31 32 33 2 2 22 31 32 33 2 8 FIG.C 8 FIG.D In this state, in a case where the user of the PCinstructs the PCvia the application programto transmit the control command to the printer of the "model XX", the three printers, namely the printer, the printer, and the printer, each receive the control command transmitted from the PC. As a result, each of the printers,andstores the command information in its memory and changes to the standby state, as depicted in. Then, in a case where the user of the PCinstructs PCvia the application programto transmit the control command to the printer of the "model XX", each of the three printers,andreceives the control command transmitted from the PC, and further stores the command information in its memory, as depicted in.

1 1 2 2 1 2 The control command received from the PCincludes the information on the input code generated by the PC, and the control command received from the PCincludes the information on the input code generated by the PC. Then, each of the printers is capable of accepting the input operation of the input code generated by the PCand the input operation of the input code generated by the PC.

1 1 1 2 2 2 In this case, the control command received from the PCis an example of a "preceding control command", the command information based on the control command received from the PCis an example of a "preceding command information", and the input operation of the input code generated by the PCis an example of a "preceding second operation". The control command received from the PCis an example of a "subsequent control command", and the command information based on the control command received from the PCis an example of a "subsequent command information", and the input operation of the input code generated by the PCis an example of a "subsequent second operation".

31 32 1 1 1 31 32 1 2 2 8 FIG.E 8 FIG.F In this state, each of the printerand the printeraccepts the input of the input code by the user of the PC, executes the process based on the command information of the PC, and as depicted in, deletes the command information of the control command received from the PCfrom its memory and returns to the initial mode. After returning to the initial mode, each of the printerand the printerdoes not accept the input of the input code. In other words, both the control commands transmitted from the PCand the PCare less likely to be applied in one printer. Further, based on elapse of the waiting period, the command information of the control command received from the PCwill be deleted from the memory, as depicted in.

2 2 33 33 2 2 1 33 8 FIG.D On the other hand, the user of the PCinputs the input code generated by the PCto the printerwhich is in the state depicted in. As a result, the printerexecutes the process based on the command information from the PC, deletes the command information of the control command received from the PCfrom its memory, and returns to the initial mode. Further, based on elapse of the waiting period, the command information of the control command received from the PCwill be deleted from the memory of the printer.

200 22 Even in a case where the plurality of users applies the control commands to the different printers connected to the same networkrespectively, each of the plurality of users simply inputs the input code generated by the application programused by himself or herself into the printer as the control target. Since each of the plurality of users does not input the input code to the printer which is not the control target, each of the printers is less likely to execute the erroneous process.

22 22 In a case where the input codes generated by the PCs are different from each other, the possibility of executing of the erroneous process by each of the printers is even lower. In order to make the input codes generated by the PCs different from each other, for example, the application programmay generate an input code including, for example, information indicating the PC in which the application programis incorporated or information indicating the date and time of transmission of the control command. The command information regarding which the input of the input code is not accepted may be deleted from the memory by restarting the printer, rather than being deleted from the memory by the passage of time.

22 1 1 200 As described in detail in the foregoing, in a case where the control command is to be transmitted from the application programof the PC, a printer as the control target changes from the initial mode to the acceptance mode based on the instruction to start the acceptance mode with respect to the printer by the user of the PC. Regarding each of the printers, in a case where a printer receives the control command while operating in the accepting mode, the printer stores the command information in its memory, and changes to the standby state; in a case where the input code is input to the printer in the standby state, the printer executes the process corresponding to the control command. On the other hand, in a case where the printer receives the control command while operating in the initial mode, the printer reads and discards the control command, and does not change to the standby state. In other words, even in a case where the plurality of users respectively instructs control target printers different from each other to start the accepting mode, each of the printers does not execute the process corresponding to the control command unless the input code is input. Therefore, even in a case where the plurality of users manages the different printers connected to the same networkfrom the plurality of PCs, respectively, a printer which is not the control target is less likely to execute the process corresponding to the control command.

While the invention has been described in conjunction with various example structures outlined above and illustrated in the figures, various alternatives, modifications, variations, improvements, and/or substantial equivalents, whether known or that may be presently unforeseen, may become apparent to those having at least ordinary skill in the art. Accordingly, the example embodiments of the disclosure, as set forth above, are intended to be illustrative of the invention, and not limiting the invention. Various changes may be made without departing from the spirit and scope of the disclosure. Therefore, the disclosure is intended to embrace all known or later developed alternatives, modifications, variations, improvements, and/or substantial equivalents. Some specific examples of potential alternatives, modifications, or variations in the described invention are provided below:

For example, an example of the information processing apparatus may be, for example, a tablet computer or a smartphone, instead of the PC1. Further, the information processing apparatus may be three or more information processing apparatuses.

22 52 4 FIG. 6 FIG. 5 FIG. Each of the display screens depicted in the embodiment is an example, and is not limited to the depicted examples. For example, the application programmay not display the status notification screendepicted inor. Further, for example, each of the printers may not display the standby screen depicted in.

22 22 In the embodiment, although the application programis configured to generate the input code, the application programmay be configured to accept the specification by the user.

For example, the accepting period or the waiting period may be omitted. For example, each of the printers may be configured to cancel the accepting mode and return to the initial mode depending on acceptance of a predetermined operation. For example, each of the printers may be configured to delete the command information stored in its memory depending on acceptance of a predetermined operation. Further, regarding each of the printers, a printer may be configured to overwrite the command information, in a case where the printer receives the control command in a state that the command information is stored in its memory.

In any one of the flowcharts disclosed in the embodiment, the order of executing a plurality of processes in any number of steps may be changed in any way, or a plurality of processes in any number of steps may be executed in parallel, as long as no contradiction arises in the contents of the processes.

The processes disclosed in the embodiment may be executed by a single CPU, a plurality of CPUs, hardware such as an ASIC, or a combination of those described above. Further, the process(es) disclosed in the embodiment may also be realized in various kinds of aspects, such as a storage medium storing a program to execute the process(s), or a method of executing the process(es), etc.

A person skilled in the art would appreciate that some aspects of the above-described embodiments and modifications are specific examples of the following aspect.

A system comprising:

an information processing apparatus; and

a plurality of image processing apparatuses, the information processing apparatus and the plurality of image processing apparatus being connected with each other via a network, wherein:

an image processing apparatus being each of the plurality of image processing apparatuses is operable in at least two modes including:

a first mode in which, in a case where the image processing apparatus receives a control command transmitted by a program of the information processing apparatus via the communication interface of the image processing apparatus, the image processing apparatus reads and discards the received control command; and

a second mode in which, in a case where the image processing apparatus receives the control command via the communication interface of the image processing apparatus, the image processing apparatus stores, in a memory, command information based on the received control command;

depending on acceptance of a first operation via the user interface of the image processing apparatus by the image processing apparatus operating in the first mode, the image processing apparatus is configured to change from the first mode to the second mode;

the information processing apparatus is:

capable of accepting transmission instructions of a control command to the image processing apparatus via a user interface of the information processing apparatus; and

configured to transmit the control command to at least one of the plurality of image processing apparatus by using the communication interface of the information processing apparatus depending on acceptance of the transmission instructions; and

the image processing apparatus is:

configured to change to a state of waiting for a second operation satisfying an execution condition of a specified process corresponding to the received control command, in a case where the image processing apparatus receives the control command via the communication interface of the image processing apparatus while operating in the second mode;

configured not to change to the state of waiting for the second operation, in a case where the image processing apparatus receives the control command via the communication interface of the image processing apparatus while operating in the first mode; and

configured to execute the specified process corresponding to the control command based on the command information stored in the memory depending on acceptance of the second operation via the user interface of the image processing apparatus in the state of waiting for the second operation.